Gemstone



FIG. 1 is a top view of a gemstone showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a side view thereof, the opposite side being identical thereto;

FIG. 4 is a side perspective view thereof;

FIG. 5 is front view thereof, the rear view being identical thereto; and,

FIG. 6 is front perspective view thereof. 

CLAIM The ornamental design for a gemstone, as shown and described. 